Thanks for the responses.

I tried both these suggestions, i.e. saving as the Default Template and Running as Administrator and both failed.

I then found that the problem was the button I was trying the save - the Pen Tool. What I did was move the Pen Tool and the Color Gallery (a button chosen at random) to the Tool Bar. I closed XPGD11, then opened it again and the Color Gallery was still there but the Pen Tools was not. So, for some reason, XPGD11 refuses to remember me moving the Pen Tool to the Toolbar.

I even tried creating my own Custom Toolbar , moving the Color Gallery and the Pen Tool to it, closing XPGD11 and reopening it. When I did my Custom Toolbar only contained the Color Gallery - the Pen Tool was nowhere in sight.

So why does XPGD11 have problems with the Pen Tool?